Which of the following yields both alkane and alkene ?

Options

A. Kolbe’s reaction
B. Williamson’s synthesis
C. Wurtz reaction
D. Sandmeyer reaction

Answer

A

Explanation

Kolbe’s Electrolysis :
(i) For alkanes : Electrolysis of a concentrated aqueous solution of either sodium or potassium salts of saturated mono carboxylic acids yields higher alkanes at anode.
`CH_3COONa hArr CH_(3)COO^(-) + Na^(+)`
Anode : `2CH_(3)COO^(-) overset(-2e^(-)) rarr CH_(3) - CH_(3) + 2CO_2`
Cathude : `2Na^(+) + 2e^(-) rarr 2Na`
`2Na + 2H_2O rarr 2NaOh + H_2`
(ii) For alkenes : Electrolysis of aqueous solutions of sodium or potassium salts of saturated dicarboxylic acids gives alkene